The particle size distribution of a metal powder affects its behavior in P/M processing and other applications of these materials. The test method may be part of. ASTM B Standard Test Method for Sieve Analysis of Metal Powders. standard by ASTM International, 04/01/ View all product details. Most Recent. Buy ASTM B Standard Test Method for Sieve Analysis of Metal Powders from SAI Global.
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Standard Test Method f ASTM D A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Other types of sieve shakers are also available, but their precision and reproducibility have not been determined.
Powder Sieve Analysis – ASTM B214
The values given in parentheses are for information only. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The test method may be part of the purchase agreement between powder supplier and user, or it may be an internal quality control test for either. Standard Series Test Sieves. In addition to the sieves listed in Table 1, a cover and collection pan are also required.
NOTE 1—The mm diameter sieve is most commonly referenced as an 8 in. Current edition approved April 1, Originally approved in Last previous edition approved in as B — The number of rotations per minute shall be between and The number of taps per minute shall be between and The hold down arm of the sieve shaker shall be? The entire apparatus shall be rigidly mounted by bolting to a solid foundation, preferably of concrete.
No further reproductions authorized. Repeat the test if error persists. Standard Series Particle Size? NOTE 2—Use of a sound proof enclosure is recommended. A portion of 40 to 60 g shall be used when the apparent density of the powder is less than 1.
The test portion should be obtained in accordance with Practices B Place the test portion on the top sieve and close this sieve with a solid cover. Then fasten the sieve assembly securely in the sieve shaker and operate the machine for a period of 15 minutes. NOTE 3—For some materials, for example brittle and friable materials, the 15 minutes may be too long. Sieving time may be adjusted for such materials, and the actual time used should be reported along asfm the test data. Report any fraction that is less than 0.
Report the actual time n214 of sieving, if it is different than 15 minutes.
ASTM B – 16 Standard Test Method for Sieve Analysis of Metal Powders
Precision and Bias4 9. Each of twelve laboratories made three tests on four powder samples using each of two sets of sieves. One set of sieves was a standard set that was circulated to each laboratory in turn.
A second set of sieves was chosen by each laboratory from its in-house sieve stock. Practice E was followed for the design and analysis of the data. Standard Series sieves in each sieve nest: Brush any material adhering to the bottom surface of the sieve and the lower frame with a soft brush into the next?
Tap the sieve just removed upside down, on the paper containing the portion that had been retained on it, and brush the back side of the sieve with the? Weigh this fraction to the nearest 0. Repeat this process for each sieve in the nest. Remove the fraction collected in the pan and weigh. Add the difference between this sum and the mass of the test portion in accordance with Section 6 to the mass of the fraction collected in the pan.
For in-house sieves R can be calculated from the following equations: For circulated sieves or by analogy matched sieves obtained by two laboratories R can be calculated from the following equations: If used continually, the sieves will, after a period of time, become less accurate and might no longer meet the requirements set in Speci? A common acceptable practice would be to use either inspection- or calibrationgrade sieves as a master set for quality control of compliance- grade working sieves.
By comparing sieve tests on the same sample, run in both the master set and the working set, a factor can be established for correcting results on the working sieves.
Over time, the correcting results should continually be evaluated.
Approved April 1, Committee B09 has identi? Approved October 1, Series has astk deleted and the columns for the Old U. Series and Tyler Series have also been deleted. Standard Series in Table 2 and examples of the Old U. Series and TylerSieve Series have also been deleted. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
ASTM B Standard Test Method for Sieve Analysis of Metal Powders_百度文库
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